502 



BOTANICAL GAZETTE [jtoe 



KUNKEL 



forms 



view 



A considerable difference in the distribution of the two forms 

 is evident from Kunkel's studies, the long cycle form being more 

 common northward and the short cycle form more common south- 



ward. 



World. Moreov 



1 



lm 



form 



especially blackberries. 



forms 



matter of convenience should be designated by different names, 

 whatever views may be held as to their relationship. Since the 

 annearance of Kunkel's first paper, appeals have been made to 



writer a number of times 

 ral names which have beer 



meet 



therefore, I have concluded to present the following arrangement 

 of nomenclature and distribution, based upon such facts and 



material as are at hand. 



The generic name Gymnoconia was founded by Lagerheim 5 m 

 1894 to more clearly recognize taxonomically the culture work 



performed 



mer 



caeomoid 



of Rubus saxatilis with the puccinioid telia (Puccinia Peckiana 

 Howe) on the same host. The same connection was made two 

 years later by Clinton 7 at Urbana, Illinois, using "Rubus villosus" 

 the native blackberry of the region, being without doubt what is 

 now called R. nigrobaccus. The genus Gymnoconia, therefore, 



form, for which 



name 



from 



Kamchatka in 1820 bv Schlechtendahl. 8 There can 



Lagerheim 



6 Tranzschel, W., Culturversuche mit Caeoma inter stitiale Schlechtd. (C. nitens 

 Schw.). Hedwigia 3:257. 1893. 



? Clinton, G. P., Relationship of Caeoma nitens and Puccinia Peckiana. Box. 

 Gaz. 20:116. 1895. 



8 Schlechtendahl, D. F. L., Horae Phys. Berol. 96. 1820. 



